Thomais may refer to:

Thomais of Alexandria, Byzantine martyr and 5th century saint Thomais of Lesbos (909–913 – c. 947–951), Byzantine laywoman and saint Thomais Orsini (born c. 1330), queen consort of Epirus and Thessaly Thomaïs Emmanouilidou (born 1997), Greek rower

See also Saint Thomas (disambiguation)